立姿振动对男青年运动员肌肉疲劳进程的肌电效应

Characteristics of Surface Electromyography Signals on the Standing Vibration in Young Male Athletes during the Muscle Fatigue Process

通过线性和非线性两方面三种定量评价方法,研究立姿振动和传统训练肌肉疲劳进程中肌电的特征,探求疲劳程度较小的训练方法。28名运动员随机分组在传统或立姿振动条件下,进行递增负荷运动试验至力竭性疲劳状态,实时监测、记录肌电图后运算求值。结果显示,相应等级负荷时,振动时平均功率频率曲线与时间的斜率(MPFs)绝对值、近似熵和分维数的时间变化率均比传统的小,达到疲劳力竭时的时间均明显推迟,都有显著性差异。因此,一次适当强度的立姿振动使机体疲劳推迟,立姿振动是疲劳程度较小的训练新思路。

The aim of the study is to research the characteristics of surface EMG signals, the corresponding intensity vibration, MPFs absolute value, change rates of ApEn. The fractal dimensions are smaller than the traditional ones and the time of the fatigue exhaustion is significantly later than the traditional ones with both having significant differences. Conclusion： One time training with appropriate intensity standing vibration leads the fatigue to appear more slowly than that of traditional training, the standing vibration is the effective training new ideas with small level of fatigue.